Hello,
I am trying to implement a MIMO burstytransmission on USRP X310 with 2 CBX
daughterboards using GNU Radio.In order to make both antennas to start
transmission synchronously Iset up the time spec in the USRP Sink code
usrp_sink_impl.cc:
_metadata.time_spec = get_time_now() +::uhd::time_spec_t(epsilon);
where epsilon is 1ms fixed delay. Thisfixed delay is a problem, because of the
GNU Radio time jitter, i.e.in one case epsilon is too small and the burst is
late (LLLL), inanother case epsilon is too large and the USRP just wastes time
forwaiting.
I want to minimize the waiting time,and make the USRP to start transmission
simultaneously as soon as the TX chains ofboth antennas have some data to
transmit. One option is makingchanges in the X310 FPGA image. My question
however is, can Iminimize the waiting time just by changing the GNU Radio code
orsettings?
Thank you in advance, Dmitry.
_______________________________________________
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
